论文标题
可调定向滤波器用于中红外光学传输开关
Tunable Directional Filter for Mid-Infrared Optical Transmission Switching
论文作者
论文摘要
控制红外（IR）辐射的光谱和角度响应是对各种新兴光子应用至关重要的具有挑战性的任务。在这里，我们通过提出和分析可调窄带定向光传输滤波器的新设计来克服这些问题。提出的热控制的多层滤波器利用了二氧化钒（VO2）的温度相关相变特性，以通过使用泵探针激光激发设置来实现有效且可逆的快速光学切换。更具体地说，由于在温度升高时引起的VO2金属性能，而高强度探针激光器被阻止，而在低探针激光强度下，通过过滤器高传输仅发生在狭窄的IR范围内，而狭窄的IR范围仅限于接近正常的入射角。所提出的多层复合介电滤波器有望在光学通信中具有应用，可以充当双功能红外滤波器和光学开关。
Controlling the spectral and angular response of infrared (IR) radiation is a challenging task of paramount importance to various emerging photonic applications. Here, we overcome these problems by proposing and analyzing a new design of a tunable narrowband directional optical transmission filter. The presented thermally controlled multilayer filter leverages the temperature dependent phase change properties of vanadium dioxide (VO2) to enable efficient and reversible fast optical switching by using a pump-probe laser excitation setup. More specifically, transmission is blocked for high intensity probe lasers due to the VO2 metallic properties induced at elevated temperatures while at low probe laser intensities high transmission through the filter occurs only for a narrowband IR range confined to near normal incident angles. The proposed multilayer composite dielectric filter is expected to have applications in optical communications, where it can act as dual functional infrared filter and optical switch.
